玉米在生长过程中,常有一部分果穗半头虚空,籽粒不满尖,有的果穗甚至没有一粒籽,只有苞叶、芯轴,对产量影响很大,要及早予以补救。 一、猛攻穗肥 玉米抽雄前10天,在接近大喇叭口期时追穗肥。此期是决定玉米果穗大小、籽粒多少的关键时期,也是玉米一生中需肥量最多的阶段,需肥量应占追肥总量的50%～60%。对中低产地块和后期脱肥的 Corn in the growth process, often part of the ear empty head half, the kernel is not full of sharp, and some even without a seed ear, only the husk, mandrel, a great impact on the yield, to be remedied as soon as possible. First, the storm spike corn tasseled tassel 10 days ago, near the big bell mouth when looking for fertilizer. This period is to determine the size of corn ear, the number of seeds of the critical period, but also the life of maize most needed fertilizer stage, the amount of fertilizer should account for 50% of the total fertilizer 60%. The middle and low yield plots and post-fattening